What is "uintatherium"

Uintatherium \U*in`ta*the"ri*um\, n. [NL., fr. Uinta, the Indian name of the region where the animals were discovered + Gr. qhri`on beast.] (Paleon.) An extinct genus of large Eocene ungulates allied to Dinoceras. This name is sometimes used for nearly all the known species of the group. See Dinoceras.

Dinoceras \Di*noc"e*ras\, n. [NL., fr. Gr. ? terrible + ?, ?, horn.] (Paleon.) A genus of large extinct Eocene mammals from Wyoming; -- called also {Uintatherium}. See Illustration in Appendix.

Note: They were herbivorous, and remarkable for three pairs of hornlike protuberances on the skull. The males were armed with a pair of powerful canine tusks.

Uintatherium ("Beast of the Uinta Mountains") is an extinct genus of herbivorous mammal that lived during the Eocene epoch; two species are currently recognized, U. anceps from the United States during the Early to Middle Eocene, and U. insperatus of Middle to Late Eocene China. Uintatherium became extinct about 37 million years ago, presumably due to climate change and competition with perissodactyls, such as brontotheres and rhinos.